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what consists of sheets of aggregated cells of similar type that cover or line the external and internal surfaces of the body
epithelium
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what does epithelium consist of (2)
- sheets of aggregated cells of similar type
- cover or line external and internal surfaces of the body
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what are the layers that make up the basement membrane (2)
- basal lamina = lamina lucida + lamina densa
- reticular lamina
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basal lamina and reticular lamina make up what
basement membrane
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what makes up the basal lamina (2)
- lamina lucida
- lamina densa
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lamina lucida and lamina densa make up what
basal lamina
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how does one demonstrate epithelium that's resting on the basement membrane (2)
- PAS technique
- silver salt staining
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what can be demonstrated with PAS technique or silver salt staining
epithelium and the basement membrane it sits on
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where do epithelium rest on
basement membrane
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what rests on the basement membrane
epithelium
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what is a low density, clear area next to the epithelium
lamina lucida
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how is the lamina lucida look and where is it in relation to epithelium cells (2)
- a low density clear area
- area closest to the epithelium
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what is lamina lucida and lamina densa composed mainly of (2)
- proteoglycans
- special type of collagen
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what is the electron-dense part of the basal lamina
lamina densa
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what is synthesized by the epithelium (2)
- lamina lucida
- lamina densa
- basal lamina
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where is the basal lamina (lamina lucida and lamina densa) synthesized
epithelium
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what is below the basal lamina
reticular lamina
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what is another name for subbasal lamina
reticular lamina
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what is another name for reticular lamina
subbasal lamina
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what connects the lamina densa to teh subepithelial connective tissue
subbasal lamina (reticular lamina)
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what is the subbasal liamina composed of
reticular fibers
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what part of the basement membrane is composed of reticular fibers
subbasal lamina or reticular lamina
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what does the subbasal lamina connect (2)
- lamina densa to
- subepithelial connective tissue
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what is the functions of epithelium tissue (4)
- protection
- absorption
- secretion
- diffusion
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what is the classification of epithelium based on (2)
- number of layers present
- shape of the cells
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the number of layers present and shape of the cells do what to epithelium cells
it classifies them
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what do simple epithelium look like
single layer of cells resting on the basement membrane
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what is a single layer of cells resting on the basement membrane classified as
simple epithelium
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what is 2 or more layers of cells with only the bgasal cell layer resting on the basement membrane called
stratified epithelium
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how do stratified epithelium look
2 or more layers of cells with only the basal cell alyer resting on the basement membrane
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what are the shape types of epithelium cells (3)
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what are the types of simple epithelium (3)
- simple squamous epithelium
- simple cuboidal epithelium
- simple columnar epithelium
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what is a single layer of thin, flat and scale-like cells
simple squamous epithelium
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what simple epithelium have a spherical or oval nucleus that gives a slightly elevated (bulging) appearence
simple squamous epithelium
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where can simple squamous epithelium found (4)
- blood vessels
- pleural and peritoneal cavities
- pulmonary alveoli
- glomerular capsule
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what type of epithelium cells are found in blood vessels
simple squamous epithelium
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what type of epithelium cells are found in pleural and peritoneal cavities
simple squamous epithelium
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what type of epithelium cells are found in pulmonary alveoli
simple squamous epithelium
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what type of epithelium cells are found in glomerular capsule
simple squamous epithelium
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what is a single layer of cells with centrally placed nucleus
simple cuboidal epithelium
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where can simple cuboidal epithelium be found (2)
- thyroid gland
- collecting ducts of the kidney
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what type of epithelium can be found in the thyroid gland and the collecting ducts of the kidney
simple cuboidal epithelium
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how do simple cuboidal epithelium look
a single layer of cuboidal cells with centrally placed nucleus
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what consists of tall, narrow cells
simple columnar epithelium
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what has their nucleus as oval and located near the base of the cell
simple columnar epithelium
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how do simple columnar epithelium look
tall, narrow cells with oval nucleus located near the base fo the cell
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where can simple columnar epithelium be found (3)
- stomach
- intestine
- gall bladder
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what cells can be found lining the stomach, intestine and gall bladder
simple columnar epithelium
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what are composed of a single layer of cells, but due to different cell shape and nuclei locations, it looks like stratified epithelium
pseudostratified columnar epithelium
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who do pseudostratified columnar epithelium look like
is really a single layer of cells, but because of the nucleus being at different levels they look statified
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where can pseudostratified columnar epithelium found
respritory system - trachea and bronchi (ciliated form)
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what type of epithelium can be found in the trachea and bronchi
pseudostratified columnar epithelium
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how are stratified epithelium named
based on top layer of cells
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where can stratified squamous epithelium be found (2)
- skin (keratinized form)
- cornea (non-keratinized)
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what type of epithelium cell is found in skin
stratified squamous epithelium
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what type of epithelium cell is found on the cornea
stratified squamous epithelium
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where can stratified cuboidal epithelium be found
lining the excretory duct of glands
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what type of epithelium cell is found lining the excretory duct of glands
stratified cuboidal epithelium
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what type of epithelium cells usually do not exceed more then 3 rows
stratified cuboidal epithelium
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stratified cuboidal epithelium can have how many rows of cells
2-3 rows (3 max)
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what type of cells line small ducts
stratified cuboidal epithelium
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what type of cells line large ducts
stratified columnar epithelium
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where can you find stratified columnar epithelium (3)
- saliva glands
- parotid ducts
- mandibular gland ducts
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what cells are found on saliva glands, parotid and mandibular gland ducts
stratified columnar epithelium
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what lines certain hollow organs and is capable of considerable distention
transitional epithelium
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what is transitional epithelium's capable of that other epithelium isn't designed for
considerable distention
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where do you find transitional epithelium (2)
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what cells line the urinary bladder and urethra
transitional epithelium
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what is usually mistaken for stratified cuboinal epithelium
transitional epithelium
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what has a top layer that's very cuboinal shape but non-distinctive basement cells
transitional epithelium
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when relaxed, what do the superficial cells of transitional epithelium present (2)
- dome-shaped
- bulge into the lumen
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when streched how do transitional epithelium present
cells reduced to only a few layers and are flattened
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